Situation
Engine hesitated on acceleration and idled erratically.
Cause
Faulty OCV
Maintenance
Diagnosis noticed P1349 that meant VVT system.
This car did not change E/G oil oftenly.
There were excessive carbon built-up in the OCV.
Then I changed OCV and VVT assembly.
Great car! Toyota Mark seems a look a like of Toyota Premio though I know both cars are reliable.
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